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    OpenPayerBilling CodesDiagnostic Radiology (Diagnostic Imaging) Procedures of the Veins and LymphaticsCPT cpt-75820-venous-flow-study-one-extremity-supervision-interpretation
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    CPT 75820: Supervision and Interpretation of Venous Flow Study, One Extremity

    Medicare pays $74 on average nationally for this procedure.

    CPT code 75820 describes physician supervision and interpretation of radiologic imaging that evaluates blood flow in the veins of a single extremity (left or right, upper or lower); service type: diagnostic vascular imaging (venous), typical site of service: imaging center or hospital radiology department where duplex or venous flow studies are performed.

    For related coverage guidance, see recent payer policy updates: Automated Ambulatory Blood Pressure Monitoring for Diagnosis of Hypertension in Patients with Elevated Office Blood Pressure, Cardiology - Ivabradine, Cardiac Computed Tomography (CCT)/Coronary Computed Tomographic Angiography (CCTA).

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    Table of contents

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    Clinical & Coding Specifications

    Clinical Context

    A typical patient is an adult referred to vascular imaging for suspected deep venous thrombosis (DVT) or venous insufficiency in a single extremity. The patient presents to an outpatient vascular lab or hospital radiology department with unilateral leg swelling, pain, erythema, or nonhealing venous ulceration. Prior to the procedure, a referring clinician documents history, focused physical exam, and indications (for example, acute swelling after immobilization or progressive varicosities). The technologist performs sonographic or contrast venographic acquisition of the affected limb under supervision. The interpreting provider (radiologist, vascular surgeon, or interventional radiologist) supervises image acquisition as required, reviews cine loops and still images, provides real‑time feedback to the technologist as needed, and issues a formal interpretation and report documenting anatomy, presence or absence of thrombus, reflux, stenosis, or collateralization. The procedure typically occurs in an outpatient vascular laboratory, hospital radiology suite, or inpatient bedside setting for critically ill patients. Results guide acute management such as anticoagulation, thrombolysis, endovascular intervention, or conservative care and are routed to the referring clinician and included in the permanent medical record.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    93970Duplex scan of extremity veins/arteries, complete bilateral studyOften performed before or instead of venography; duplex is a noninvasive alternative to evaluate for DVT or reflux.
    93971Duplex scan of extremity veins/arteries, unilateral or limited studyCommonly performed for single‑extremity evaluation prior to or following venographic interpretation.
    36475Endovenous ablation therapy of incompetent vein, radiofrequency; percutaneousMay follow diagnostic venography when refluxing veins are identified and treated.
    37243Vascular embolization or occlusion, therapeutic, any method; venousPerformed in interventional suite for treatment of venous malformations or embolization guided by venography.
    36011Introduction of catheter, femoral vein; diagnostic venography accessAccess and catheterization codes often relate to contrast venography procedures that produce the images interpreted under 75820.

    Related Modifiers

    10 rows

    ModifierDescriptionWhen to Use
    26Modifier 26 (Professional Component) identifies and bills only the professional portion of a split service — the physician’s interpretation, report, and medical judgment — when the technical…- Use CPT Modifier -26 when you are billing only the professional component (PC) of a split‑bill eligible service—i.e., you performed the physician interpretation, medical judgment and prepared a…
    59Modifier 59 indicates a distinct procedural service when two procedures that are not normally billed together are clinically and procedurally separate. The CPT definition (as reiterated by CMS)…- Use modifier -59 to report a distinct procedural service when documentation supports that the procedure reported is not normally billed together with another service on the same day because of a…
    52Modifier ‑52 (Reduced Services) indicates that a service or procedure was partially reduced or omitted at the provider’s discretion, allowing reporting of the basic procedure number with a qualifier…- Use modifier -52 when a physician or qualified health professional electively reduces or omits part of a procedure or service (for example, performing fewer required views or omitting a portion of…
    53Modifier 53 (Discontinued Procedure) signals that a surgical or diagnostic service was begun by the physician but terminated because of extenuating circumstances that threatened the patient’s…- Use modifier -53 when a physician/qualified healthcare professional has started a surgical or diagnostic procedure (e.g., anesthesia administered, incision or scope insertion) and then discontinues…
    76Modifier -76, Repeat Procedure or Service by Same Physician or Other Qualified Health Care Professional, is appended when the same provider performs an identical, medically necessary procedure or…- Use modifier -76 when the same physician or other qualified health care professional performs an identical procedure or service a second (or subsequent) time on the same date of service and the…
    77Modifier 77 indicates that a previously performed procedure or service was legitimately repeated by a different physician or other qualified health care professional. The AMA’s CPT definition…- Use modifier 77 when a basic procedure or service already performed is repeated by a different physician or other qualified health care professional (for example, a second provider independently…
    22Modifier –22 (Increased Procedural Services) is used when a reported procedure is substantially more extensive than normally required. The CPT Manual and CMS state it may be appended only when the…- When to use: Append modifier -22 to a procedural CPT code when the service performed is substantially more extensive than the usual service described by that code — i.e., the procedure required…
    50Modifier –50 (Bilateral Procedure) is appended to a CPT code when an identical procedure is performed on paired anatomical structures during the same operative session. The AMA states to add…- Use modifier -50 when the same CPT surgical, diagnostic, or radiology procedure is performed on paired anatomical structures (both sides of the body) during the same operative/session by the same…
    27Modifier 27 indicates a separate, subsequent outpatient hospital E/M service provided to the same patient on the same date by a different provider in a hospital outpatient setting. It is a…- Use modifier -27 on facility (hospital outpatient/ambulatory service center) claims to report a subsequent, separate, and distinct outpatient E/M service provided to the same patient on the same…
    80CPT® Modifier 80 (Assistant Surgeon) is appended to a surgical CPT code when a physician (MD or DO) provides full, continuous assistance throughout the operative procedure. It is intended only for…- Use CPT Modifier -80 when a physician (MD or DO) serves as an assistant surgeon and provides full, continuous assistance throughout the entire operative procedure; append -80 to the surgical CPT…

    Related Provider Taxonomies

    8 rows

    Taxonomy Code
    2080P0207X
    2084P0800X
    207RH0000X
    207K00000X
    207L00000X
    171100000X
    146L00000X
    261QR0200X

    Related ICD-10-CM Codes

    28 rows

    ICD-10-CM CodeDescription
    I80.201Phlebitis and thrombophlebitis of unspecified deep vessels of right lower extremity
    I80.202Phlebitis and thrombophlebitis of unspecified deep vessels of left lower extremity
    I80.203Phlebitis and thrombophlebitis of unspecified deep vessels of lower extremities, bilateral
    I82.401Acute embolism and thrombosis of unspecified deep veins of right lower extremity
    I82.402Acute embolism and thrombosis of unspecified deep veins of left lower extremity
    I82.403Acute embolism and thrombosis of unspecified deep veins of lower extremity, bilateral
    I82.409Acute embolism and thrombosis of unspecified deep veins of unspecified lower extremity
    I82.411Acute embolism and thrombosis of right femoral vein
    I82.412Acute embolism and thrombosis of left femoral vein
    I82.413Acute embolism and thrombosis of femoral vein, bilateral

    Showing 1–10 of 28

    Related Payer Policy Updates

    Specialty: Cardiology1 / 3

    10 rows

    PolicyPayerEffective Date
    Automated Ambulatory Blood Pressure Monitoring for Diagnosis of Hypertension in Patients with Elevated Office Blood PressureBluecross Idaho2026-11-01
    Cardiology - IvabradineCigna2026-10-15
    Cardiac Computed Tomography (CCT)/Coronary Computed Tomographic Angiography (CCTA)univerahealthcare2026-10-15
    Percutaneous Ventricular Assist DeviceUnitedHealthcare2026-10-01
    Cardiovascular Disease Risk AssessmentOscar Health2026-10-01
    Biomarkers for Myocardial Infarction and Chronic Heart FailureOscar Health2026-10-01
    Multiple Procedure Payment Reduction for Diagnostic Cardiovascular ProceduresBlue Cross Blue Shield - Maine2026-10-01
    Left Atrial Appendage Closure Devicesexcellus_health_plan_inc2026-09-17
    Left Atrial Appendage Closure Devicesuniverahealthcare2026-09-17
    Cardiac Omnibus CodesCigna2026-09-15

    Related Codes

    CPT-75801-LYMPHATIC-IMAGING-SINGLE-EXTREMITY-SUPERVISION-INTERPRETATION

    CPT 75801: Lymphangiography, Single Extremity, Supervision and Interpretation

    CPT-75803-BILATERAL-EXTREMITY-LYMPHATIC-IMAGING-SUPERVISION-INTERPRETATION

    CPT 75803: Bilateral Lymphatic Imaging of Extremities, Interpretation

    CPT-75805-UNILATERAL-LYMPHATIC-IMAGING-ABDOMEN-PELVIS

    CPT 75805: Lymphatic Imaging, Unilateral Abdominal or Pelvic Supervision/Interpretation

    CPT-75807-BILATERAL-ABDOMINAL-PELVIC-LYMPHATIC-IMAGING-SUPERVISION-INTERPRETATION

    CPT 75807: Lymphatic Imaging, Bilateral Abdomen/Pelvis

    CPT-75809-IMAGING-EVALUATION-INDWELLING-INFUSION-PUMP-NONVASCULAR-SHUNT

    CPT 75809: Imaging Supervision and Interpretation for Infusion Pump or Shunt

    CPT-75810-SPLENIC-PORTAL-VEIN-IMAGING-INTERPRETATION

    CPT 75810: Portal and Splenic Vein Radiologic Supervision and Interpretation

    CPT-75822-BILATERAL-EXTREMITY-VENOGRAPHY-SUPERVISION-INTERPRETATION

    CPT 75822: Bilateral Extremity Venography, Supervision & Interpretation

    CPT-75825-INFERIOR-VENA-CAVA-VENOGRAPHY-SERIALOGRAPHY-INTERPRETATION

    CPT 75825: Venography of Inferior Vena Cava with Serialography

    CPT-75827-SUPERIOR-VENA-CAVA-VENOGRAPHY-SERIALOGRAPHY

    CPT 75827: Superior Vena Cava Venography with Serialography

    CPT-75831-SELECTIVE-VENOGRAPHY-SINGLE-KIDNEY-SUPERVISION-INTERPRETATION

    CPT 75831: Selective Venography of One Kidney, Supervision & Interpretation

    Showing 1–10 of 21

    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
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